Provided by: xscreensaver-data-extra_5.08-0ubuntu3_i386 bug
 

NAME

        webcollage - decorate the screen with random images from the web
 

SYNOPSIS

        webcollage   [-display  host:display.screen]  [-root]  [-window-id  id]
        [-verbose] [-timeout secs] [-delay secs] [-background bg]  [-no-output]
        [-urls-only]  [-imagemap  filename-base]  [-size  WxH] [-opacity ratio]
        [-filter command] [-filter2 command] [-http-proxy  host[:port]]  [-dic-
        tionary dictionary-file] [-driftnet [cmd]] [-fps]
 

DESCRIPTION

        The webcollage program pulls random image off of the World Wide Web and
        scatters them on the root window.  One satisfied customer described  it
        as "a nonstop pop culture brainbath."  This program finds its images by
        doing random web searches, and  extracting  images  from  the  returned
        pages.
 
        webcollage is written in perl(1) and requires Perl 5.
 
        It  will  be  an order of magnitude faster if you also have the webcol-
        lage-helper program installed (a GDK/JPEG image compositor),  but  web-
        collage works without it as well.
 
        webcollage can be used in conjunction with the driftnet(1) program (the
        Unix equivalent of EtherPEG) to snoop images from traffic on your local
        subnet, instead of getting images from search engines.
 

OPTIONS

        webcollage accepts the following options:
 
        -root   Draw  on  the root window.  This option is mandatory, if output
                is being produced: drawing to a window other than the root win-
                dow is not yet supported.
 
                Images  are  placed  on  the  root  window  by using one of the
                xscreensaver-getimage(1), chbg(1), xv(1), xli(1),  or  xloadim-
                age(1) programs (whichever is available.)
 
        -window-id id
                Draw  to  the  indicated window instead; this only works if the
                xscreensaver-getimage(1) program is installed.
 
        -verbose or -v
                Print diagnostics to stderr.  Multiple -v switches increase the
                amount  of  output.   -v will print out the URLs of the images,
                and where they were placed; -vv will print  out  any  warnings,
                and  all URLs being loaded; -vvv will print information on what
                URLs were rejected; and so on.
 
        -timeout seconds
                How long to wait for a URL to complete before giving up  on  it
                and moving on to the next one.  Default 30 seconds.
 
        -delay seconds
                How  long to sleep between images.  Default 2 seconds.  (Remem-
                ber that this program probably spends a lot of time waiting for
                the network.)
 
        -background color-or-ppm
                What  to  use  for the background onto which images are pasted.
                This may be a color name, a hexadecimal  RGB  specification  in
                the form '#rrggbb', or the name of a PPM file.
 
        -size WxH
                Normally,  the  output image will be made to be the size of the
                screen (or target window.)  This lets you specify  the  desired
                size.
 
        -opacity ratio
                How  transparently to paste the images together, with 0.0 mean-
                ing "completely transparent" and 1.0 meaning "opaque."  Default
                0.85.   A  value  of  around  0.3 will produce an interestingly
                blurry image after a while.
 
        -no-output
                If this option is specified, then  no  composite  output  image
                will  be  generated.  This is only useful when used in conjunc-
                tion with -verbose.
 
        -urls-only
                If this option is specified, then  no  composite  output  image
                will  be  generated:  instead,  a  list  of  image URLs will be
                printed on stdout.
 
        -imagemap filename-base
                If this option is specified, then instead of writing  an  image
                to  the root window, two files will be created: "base.html" and
                "base.jpg".  The JPEG will be the collage; the HTML  file  will
                include  that  image, and an image-map making the sub-images be
                linked to the  pages  on  which  they  were  found  (just  like
                http://www.jwz.org/webcollage/.)
 
        -filter command
                Filter  all  source  images  through this command.  The command
                must take a PPM file on stdin, and write a new PPM file to std-
                out.  One good choice for a filter would be:
 
                     webcollage -root -filter 'vidwhacker -stdin -stdout'
 
        -filter2 command
                Filter  the  composite image through this command.  The -filter
                option applies to the sub-images; the -filter2 applies  to  the
                final, full-screen image.
 
        -http-proxy host:port
                If  you  must go through a proxy to connect to the web, you can
                specify it  with  this  option,  or  with  the  $http_proxy  or
                $HTTP_PROXY environment variables.
 
        -dictionary file
                Webcollage  normally  looks at the system's default spell-check
                dictionary to generate words to feed into the  search  engines.
                You can specify an alternate dictionary with this option.
 
                Note that by default, webcollage searches for images using sev-
                eral different methods, not all  of  which  involve  dictionary
                words,  so  using  a  "topical"  dictionary  file  will not, in
                itself, be as effective as you might be hoping.
 
        -driftnet [ args ]
                driftnet(1) is a program that snoops your  local  ethernet  for
                packets  that  look  like they might be image files.  It can be
                used in conjunction with webcollage to generate  a  collage  of
                what  other people on your network are looking at, instead of a
                search-engine collage.  If you have driftnet installed on  your
                $PATH, just use the -driftnet option.  You can also specify the
                location of the program like this:
 
                     -driftnet /path/to/driftnet
 
                or, you can provide extra arguments like this:
 
                     -driftnet '/path/to/driftnet -extra -args'
 
                Driftnet version 0.1.5 or later is  required.   Note  that  the
                driftnet  program  requires root access, so you'll have to make
                driftnet be setuid-root for this to work.  Please exercise cau-
                tion.
 
        -fps    Display the current frame rate and CPU load.
 

ENVIRONMENT

        DISPLAY to get the default host and display number.
 
        XENVIRONMENT
                to  get  the  name of a resource file that overrides the global
                resources stored in the RESOURCE_MANAGER property.
 
        http_proxy or HTTP_PROXY
                to get the default HTTP proxy host and port.
        /usr/dict/words, /usr/share/lib/dict/words, or /usr/share/dict/words to
        find the random words to feed to certain search engines.
 
            http://www.altavista.com/image/randomlink,
            http://random.yahoo.com/fast/ryl,
            http://www.livejournal.com/stats/latest-img.bml, and
            http://www.google.com/ to find random web pages.
 

BOOBIES

        The Internet being what it is, absolutely anything might show up in the
        collage including -- quite possibly -- pornography, or even nudity.
 

BUGS

        Animating GIFs are not supported: only the first frame will be used.
 

UPGRADES

        The latest version of webcollage can be found as  a  part  of  xscreen-
        saver,  at  http://www.jwz.org/xscreensaver/, or on the WebCollage page
        at http://www.jwz.org/webcollage/.
 
        DriftNet: http://www.ex-parrot.com/~chris/driftnet/
        X(1),  xscreensaver(1),  xli(1),  xv(1),   xloadimage(1),   ppmmake(1),
        giftopnm(1), pnmpaste(1), pnmscale(1), djpeg(1), cjpeg(1), xdpyinfo(1),
        perl(1), vidwhacker(6), dadadodo(1), driftnet(1) EtherPEG, EtherPeek
 

COPYRIGHT

        Copyright (C) 1998-2005 by Jamie Zawinski.  Permission  to  use,  copy,
        modify,  distribute,  and  sell this software and its documentation for
        any purpose is hereby granted without  fee,  provided  that  the  above
        copyright  notice  appear  in  all  copies and that both that copyright
        notice and this permission notice appear in  supporting  documentation.
        No  representations are made about the suitability of this software for
        any purpose.  It is provided "as is" without express  or  implied  war-
        ranty.
 

AUTHOR

        Jamie Zawinski <jwz@jwz.org>, 24-May-1998.